Since dtc v1.4.6-9-gaadd0b65c987, when compiling dtb with W=1 option,the following warnings are triggered :

arch/arm/boot/dts/stih418-b2199.dtb: Warning (alias_paths): /aliases: aliases property name must include only lowercase and '-'arch/arm/boot/dts/stih407-b2120.dtb: Warning (alias_paths): /aliases: aliases property name must include only lowercase and '-'arch/arm/boot/dts/stih410-b2260.dtb: Warning (alias_paths): /aliases: aliases property name must include only lowercase and '-'arch/arm/boot/dts/stih410-b2120.dtb: Warning (alias_paths): /aliases: aliases property name must include only lowercase and '-'

_ Patch 1, convert the aliases property name in lowercase in all STi board dts files.

_ Patch 2, remove "console=serialN" from bootargs property

_ Patch 3, rework the tty driver st-asc accordingly, as aliases id is retrieved using of_alias_get_id() with a defined string with is not lowercase only.